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Dialogus cum Nestorio

Cyril of Alexandria · khazarzar

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Work dossier · summary and historical context

Summary

The Dialogus cum Nestorio is a theological dialogue attributed to Cyril of Alexandria, composed in Greek shortly after the Council of Ephesus (431 CE). It presents a forensic, point-by-point refutation of Nestorius’ Christology, particularly his rejection of the title Theotokos for Mary. The work employs a combative register typical of late-antique doctrinal polemic and is structured as an exchange between Cyril and Nestorius. Its manuscript base is uncertain, as the sole digital edition (khazarzar) lacks a critical apparatus. The dialogue was cited in later Byzantine florilegia and at the Second Council of Constantinople (553) as a witness to Cyrillian orthodoxy against dyophysite interpretations.

The Dialogus cum Nestorio is a key primary source for understanding the Christological debates of the fifth century, particularly the Nestorian controversy. It illustrates Cyril’s exegetical and rhetorical strategies and was later cited as a patristic witness at the Second Council of Constantinople (553). Its uncertain manuscript tradition, however, limits its reliability without further critical study.

Historical context

The dialogue was composed in the immediate aftermath of the Council of Ephesus (431 CE), where Cyril of Alexandria led the opposition to Nestorius, patriarch of Constantinople (428–431). Nestorius had argued against calling Mary Theotokos, insisting it confused Christ’s human and divine natures. Cyril championed the term to affirm the unity of Christ’s person. The work reflects the intense theological and political struggle within the early Byzantine church, likely written in Alexandria or Constantinople. Its transmission is uncertain; no critical edition of Greek witnesses exists, and the sole digital transcription (khazarzar) does not cite its manuscript source. The dialogue was later used in conciliar acts and florilegia to support Cyrillian orthodoxy, but its textual history remains unassessed for lacunae or interpolations.

Apparatus · what the pipeline recorded

Annotation and terms

24 commentary units 10 scripture4 term4 background3 structure2 caution1 reception 4 derived notes 6 open questions 4 narrative
What the kinds mean

Pipeline notes

  • coverageNo English translation could be identified: a language model asked twice could not name one, though it could not rule one out either. That is not proof that none exists — translations in dissertations, recent books and other modern languages are easily missed.
  • limitThe English is a machine draft produced passage by passage from the transcribed Coptic; no human has verified it. The commentary is model-written and cites only keys the pipeline could resolve.
  • registerRegister: other in ancient Greek; the English keeps the liturgical formulae and the vocatives rather than normalising them.
  • structurePassages: 4 narrative.
  • caution3 passage(s) are fragmentary in the source; the English bridges each break and says so in the note.
  • scripture1 scriptural phrase match(es) noted: John 1:14.
  • sourceSource edition: khazarzar — Migne PG text (public domain); khazarzar host and the digitising project state no licence for this layer

Term index

CopticRenderingCountFirst
no glossary terms recorded
khazarzar-cyril-of-alexandria-dialogus-cum-nestorio:1 · narrativehigh
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ΤΟΥ ΑΥΤΟΥ ΑΓΙΟΥ ΚΥΡΙΛΛΟΥ ΔΙΑΛΕΞΙΣ ΠΡΟΣ ΝΕΣΤΟΡΙΟΝ ΟΤΙ ΘΕΟΤΟΚΟΣ Η ΑΓΙΑ ΠΑΡΘΕΝΟΣ ΚΑΙ ΟΥ ΧΡΙΣΤΟΤΟΚΟΣ. {ΝΕΣΤΟΡΙΟΣ.} Οταν ἡ θεία Γραφὴ διαλέγηται γέννησιν Χριστοῦ ἐκ Μαρίας τῆς παρθένου [η] θάνατον, οὐδαμοῦ τεθεῖσα φαίνεται Θεοῦ, ἀλλὰ Χριστοῦ η Κυρίου η ̓Ιησοῦ, ἐπειδὴ τὰ τρία ταῦτα τῶν δύο φύσεων σημαντικὰ, ποτὲ μὲν ταύτης, ποτὲ δὲ ἐκείνης· οιόν τι λέγω· Οταν τὴν ἐκ Παρθένου γέννησιν ἡμῖν τοῦ Χριστοῦ μηνύει [ξοδ. μηνύων] ὁ ̓Απόστολος, λέγει· ̓Εξαπέστειλεν ὁ Θεὸς τὸν ἑαυτοῦ Υἱὸν γενόμενον ἐκ γυναικός· οὐκ ειπε δὲ, ̓Εξαπέστειλε τὸν Θεὸν Λόγον· λαμβάνει δὲ τὸ ονομα τὸ μηνύον τὰς δύο γενέσεις, ητοι Θεὸν [ξοδ. Θεὸς] καὶ ανθρωπον, ἐπειδὴ διπλοῦς ἐστιν ὁ Χριστός· Υἱὸν γὰρ Θεοῦ ἐγέννησεν ἡ Παρθένος, καθότι εφησεν· ̔Υμεῖς δὲ θεοί ἐστε καὶ υἱοὶ ̔Υψίστου πάντες· οθεν Χριστοτόκον, Κυριοτόκον, ἀνθρωποτόκον ἐμάθομεν ἀπὸ τῆς Γραφῆς λέγειν, Θεοτόκον δὲ οὐδαμῶς ἐδιδάχθημεν λέγειν τὴν ἁγίαν Παρθένον. {ΚΥΡΙΛΛΟΣ.} ̔Ησαΐας βοᾷ ἐν Πνεύματι λέγων· ̓Ιδοὺ ἡ παρθένος ἐν γαστρὶ εξει, καὶ τέξεται υἱὸν, καὶ καλέσουσι τὸ ονομα αὐτοῦ ̓Εμμανουὴλ, ο ἐστι μεθερμηνευόμενον, Μεθ' ἡμῶν ὁ Θεός· Θεὸς ουν ὁ τεχθεὶς, καν θέλῃς, καν μὴ θέλῃς. {ΝΕΣΤ.} ̔Ο αγγελος τῷ ̓Ιωσὴφ ειπεν· ̓Αναστὰςπαράλαβε τὸ παιδίον καὶ τὴν μητέρα αὐτοῦ, καὶ φεῦγε εἰς Αιγυπτον, καὶ ισθι ἐκεῖ εως αν ειπω σοι· οὐκ ειπε δὲ, Παράλαβε τὸν Θεὸν καὶ τὴν μητέρα αὐτοῦ. {ΚΥΡ.} ̓Αλλ' ὁ ἀρχάγγελος Γαβριὴλ πρὸς τὴν Παρθένον λέγει· Πνεῦμα αγιον ἐπελεύσεται ἐπὶ σὲ, καὶ δύναμις ̔Υψίστου ἐπισκιάσει σοι·
English
Of the same holy Cyril, a dialogue with Nestorius, that the holy Virgin is Theotokos and not Christotokos. {Nestorius.} When divine Scripture speaks of the birth of Christ from the Virgin Mary or of his death, nowhere is it found to be set down as of God, but of Christ or of the Lord or of Jesus, since these three terms are indicative of the two natures, sometimes of this one, sometimes of that. I mean something like this: When the Apostle indicates to us the birth of Christ from the Virgin, he says, "God sent forth his own Son, born of a woman"; he did not say, "He sent forth the God Logos." He takes the name that indicates the two births, that is, God and man, since Christ is twofold. For the Virgin gave birth to a Son of God, inasmuch as he said, "But you are gods and sons of the Most High, all of you." Hence we have learned from Scripture to say Christotokos, Kyriotokos, anthropotokos, but we were never taught to call the holy Virgin Theotokos. {Cyril.} Isaiah cries out in the Spirit, saying, "Behold, the virgin will conceive in her womb and bear a son, and they will call his name Emmanuel," which is interpreted, "God with us." Therefore the one born is God, whether you wish it or not. {Nest.} The angel said to Joseph, "Arise, take the child and his mother, and flee into Egypt, and stay there until I tell you"; he did not say, "Take God and his mother." {Cyr.} But the archangel Gabriel says to the Virgin, "The Holy Spirit will come upon you, and the power of the Most High will overshadow you.
khazarzar-cyril-of-alexandria-dialogus-cum-nestorio:2 · narrativehigh
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διὸ καὶ τὸ γεννώμενον ἐκ σοῦ αγιον, υἱὸς ̔Υψίστου κληθήσεται. {ΝΕΣΤ.} ̔Ο ̓Απόστολος εφη· ̔Εαυτὸν ἐκένωσε,μορφὴν δούλου λαβών· οπερ ἐστὶ τὸ ἡμέτερον ἐνδυσάμενος σῶμα, ενθα προέκοπτε σοφίᾳ καὶ ἡλικίᾳ καὶ χάριτι παρὰ Θεῷ καὶ ἀνθρώποις, ὡς Κυριακὸς ανθρωπος. {ΚΥΡ.} Πᾶν τὸ γενόμενον ἐκ τῆς σαρκὸς, σάρξ ἐστι· οὐκ ἀναιρεῖ δὲ τῆς γεννήσεως παράδοξον· ὡς γὰρ ὁ Θεὸς τίκτει θεϊκῶς, ουτω καὶ ἡ θεοπρεπὴς Παρθένος ετεκεν ἐν σαρκὶ τὸν ἐκ Θεοῦ Θεὸν Λόγον. {ΝΕΣΤ.} Πᾶσα μήτηρ τὸ ὁμοούσιον αὐτῆς τίκτει· οὐκ εστιν ουν αὐτοῦ μήτηρ, εἰ μὴ αὐτὸς ὁμοούσιος αὐτῆς ὑπάρχει· πῶς γὰρ αὐτοῦ μήτηρ τοῦ ἀλλοτρίου τῆς οὐσίας αὐτῆς ὑπάρχοντος [ξοδ. τὸ ἀλλότριον ὑπάρχον]; {ΚΥΡ.} ̔Ημᾶς ἐκ Παρθένου καὶ ἐκ Πνεύματος ἁγίου ενα Υἱὸν ἐδιδάχθημεν ὁμολογεῖν, ὁμοούσιον τῇ μητρὶ ὡς τῷ Πατρὶ, καθὼς οἱ Πατέρες εἰρήκασιν. {ΝΕΣΤ.} Διαιρῶ τὰς φύσεις, ἑνῶ τὴν προσκύνησιν, ἐπειδὴ ἀχώριστος τοῦ φαινομένου Θεός· διὰ τοῦτο οὐ χωρίζω τὴν τιμήν. {ΚΥΡ.} ̔Ο διαιρῶν τὰς φύσεις, δύο υἱοὺς λέγει, μὴ πιστεύων τῇ Γραφῇ λεγούσῃ, οτι ̔Ο Λόγος σὰρξ ἐγένετο. {ΝΕΣΤ.} Παῦλος λέγει ἀρχιερέα καὶ ἀπόστολον τῆς ὁμολογίας ἡμῶν γενέσθαι ̓Ιησοῦν, πιστὸν οντα τῷ ποιήσαντι ἑαυτὸν, θυσίαν ἑαυτὸν προσέφερεν ὑπὲρ ἑαυτοῦ ὡς ὑπὲρ τοῦ λαοῦ· οθεν ἀρχιερεὺς καθίσταται τὰ πρὸς τὸν Θεόν. {ΚΥΡ.} Παῦλος λέγει· Χριστὸς απαξ προσενεχθεὶς εἰς τὸ πολλῶν ἀνενεγκεῖν ἁμαρτίας, ἐκ δευτέρου χωρὶς ἁμαρτίας ὀφθήσεται. Καὶ πάλιν· ̔Αμαρτίαν οὐκ ἐποίησεν, καὶ δόλος οὐχ ὑπῆρχεν ἐν τῷ στόματι αὐτοῦ· καὶ ἰδοὺ αὐτὸς ἑαυτὸν προσφέρει ὑπὲρ ἡμῶν·
English
Therefore, the child born from you shall be called holy, son of the Most High. {Nestorius.} The Apostle said: He emptied himself, taking the form of a slave, which is our body that he put on, where he advanced in wisdom and stature and grace before God and men, as a man of the Lord. {Cyril.} Everything born from flesh is flesh; but this does not negate the wonder of the birth. For just as God gives birth in a divine manner, so too the God-bearing Virgin gave birth in the flesh to the God Logos from God. {Nestorius.} Every mother gives birth to that which is consubstantial with herself; therefore she is not his mother unless he himself is consubstantial with her. For how could she be mother of him who is of a substance foreign to her? {Cyril.} We have been taught to confess one Son from the Virgin and from the Holy Spirit, consubstantial with the mother as with the Father, as the Fathers have said. {Nestorius.} I separate the natures, but unite the worship, since God is inseparable from what is seen; therefore I do not separate the honor. {Cyril.} He who separates the natures speaks of two sons, not believing the Scripture which says that the Logos became flesh. {Nestorius.} Paul says that Jesus became high priest and apostle of our confession, being faithful to the one who made him, offering himself as a sacrifice for himself as for the people; whence he is appointed high priest in matters concerning God. {Cyril.} Paul says: Christ, once offered to bear the sins of many, will appear a second time without sin. And again: He committed no sin, and there was no deceit in his mouth; and behold, he offers himself for us.
khazarzar-cyril-of-alexandria-dialogus-cum-nestorio:3 · narrativehigh
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ιδε ουν οὐχ ὑπὲρ ἑαυτοῦ ἀνήνεγκεν αὑτὸν, ἀλλ' ὑπὲρ τοῦ λαοῦ. {ΝΕΣΤ.} Αὐτοῦ λέγοντος· ̔Ο τρώγων μου τὴν σάρκα, καὶ πίνων μου τὸ αιμα, ζήσεται δι' ἐμοῦ, καθὼς ἐγὼ ζῶ διὰ τὸν ἀποστείλαντά με Πατέρα. Τίνα ουν ἐσθίεις, αἱρετικέ; τὴν θεότητα, η τὴν ἀνθρωπότητα; Οὐκ ειπε γὰρ ὁ Χριστὸς, ̔Ο τρώγων μου τὴν θεότητα, ἀλλὰ, Τὴν σάρκα. {ΚΥΡ.} ̓Εγὼ μὲν πίστει μεταλαμβάνω τὴν τοῦ ζωοποιοῦ Λόγου ζωοποιοῦσαν σάρκα· οθεν ὁ Σωτὴρ εφη· Οἱ ἐσθίοντες ἐκ τούτου τοῦ αρτου, οὐ μὴ γεύσωνται θανάτου εἰς τὸν αἰῶνα· οἱ δὲ ἀναξίως μεταλαμβάνοντες, διὰ τῆς ἀπειθείας κριθήσονται. {ΝΕΣΤ.} Κύριος ἀπέσταλκέ με καὶ τὸ Πνεῦμα αὐτοῦ· Πνεῦμα Κυρίου ἐπ' ἐμὲ, ου εινεκεν εχρισέ με· καὶ διὰ τοῦτό φησιν· Εχρισέ σε ὁ Θεὸς, ὁ Θεός σου, ελαιον ἀγαλλιάσεως παρὰ τοὺς μετόχους σου· νόει ουν τὸν χρισθέντα, ὁμολόγει τὸν χρίσαντα, καὶ προσκύνει τὸν ναὸν διὰ τὸν ἐν αὐτῷ κατοικοῦντα. {ΚΥΡ.} ̓Εγὼ ἐκ Πνεύματος ἁγίου καὶ Μαρίας τῆς Παρθένου ενα Υἱὸν ἐκ δύο ὁμολογῶ· τὸν ενα εἰς δύο οὐ διαιρῶ. {ΝΕΣΤ.} Πῶς ἀγνοεῖν λέγεις τὴν ωραν, ην ὁ Υἱὸς οὐκ οιδεν, εἰ μὴ μόνος ὁ Πατήρ; Η πῶς εἰδὼς ἀρνεῖται [ξοδ. αρχεται]; Η μὴ εἰδὼς, πῶς ἐκλήθη σοφία καὶ δύναμις Θεοῦ ὁ τῆς ἀγνοίας μετέχων (ξοδ. τὸν ἀγνοίας μετέχοντα τόπον); {ΚΥΡ.} Οὐκ ἀγνοεῖ ὁ Υἱὸς τοῦ Θεοῦ τὴν ωραν, τὰ πάντα εἰδὼς καὶ εχων ἐν ἑαυτῷ τὸν Πατέρα, καθὼς αὐτὸς ειπεν· Οὐδεὶς γινώσκει τὸν Πατέρα, εἰ μὴ ὁ Υἱός· μόνος τὴν φύσιν τοῦ Πατρὸς γινώσκει τὴν πρὸ πάντων, καὶ τὸ τέλος τοῦ αἰῶνος ἀγνοεῖ ὁ Υἱὸς τοῦ Θεοῦ; Μὴ γένοιτο·
English
See then, he did not offer it for himself, but for the people. {Nestorius.} He himself says: "He who eats my flesh and drinks my blood will live through me, just as I live through the Father who sent me." Whom then do you eat, heretic? The divinity or the humanity? For Christ did not say, "He who eats my divinity," but "my flesh." {Cyril.} I for my part partake in faith of the life-giving flesh of the life-giving Word; for the Savior said: "Those who eat of this bread will never taste death for eternity; but those who partake unworthily will be judged through their disobedience." {Nestorius.} The Lord sent me and his Spirit; the Spirit of the Lord is upon me, because he anointed me; and therefore he says: "God, your God, anointed you with oil of gladness beyond your fellows." Understand then the anointed one, acknowledge the anointer, and venerate the temple because of the one dwelling in it. {Cyril.} I confess one Son from the Holy Spirit and from Mary the Virgin, from two natures; I do not divide the one into two. {Nestorius.} How can you say he is ignorant of the hour, which the Son does not know, unless only the Father knows it? Or how, knowing, does he deny it? Or, not knowing, how is he called wisdom and power of God, he who partakes of ignorance? {Cyril.} The Son of God is not ignorant of the hour, knowing all things and having the Father in himself, just as he himself said: "No one knows the Father except the Son; only he knows the nature of the Father before all things." And does the Son of God not know the end of the age? Let it not be so.
khazarzar-cyril-of-alexandria-dialogus-cum-nestorio:4 · narrativehigh
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ἀλλ' ἀγνοεῖ μὲν ὁ κατὰ χάριν Υἱὸς, οὐ μέντοι γε ὁ κατὰ φύσιν· κατὰ χάριν ἡμεῖς ἐσμεν ἀγνοοῦντες τὸ πᾶν, καὶ μηδὲν ἐπιστάμενοι περὶ τὰ τέλη τοῦ αἰῶνος. {ΝΕΣΤ.} Φυσικῶς πεινῶμεν καὶ διψῶμεν καὶ καθεύδομεν, οὐ γνώμῃ τοῦτο πάσχοντες, ἀλλ' ἀνάγκῃ φύσεως ὑποκείμενοι· τί ουν; εὑρεθήσεται Θεὸς ἀναγκαστικοῖς νόμοις ἐξακολουθῶν; Μὴ γένοιτο. {ΚΥΡ.} ̔Ημεῖς μὲν φυσικῶς πεινῶμεν καὶ διψῶμεν καὶ καθεύδομεν, οὐ γνώμῃ, ἀλλ' ἀνάγκῃ φύσεως δουλεύοντες· αὐτὸς δὲ οὐκ ἀνάγκῃ, ἀλλὰ γνώμῃ· καὶ γὰρ ἐκ πέντε αρτων πεντακισχιλίους ἐχόρτασεν, καὶ ἐξ ἑπτὰ πάλιν τετρακισχιλίους· αὐτὸς ειπεν· Οὐδεὶς λαμβάνει τὴν ψυχήν μου ἀπ' ἐμοῦ, ἀλλ' οταν θέλω λαμβάνω αὐτήν· οὐδεὶς δὲ ανθρωπος δύναται τοῦτο ποιῆσαι, εἰ μὴ ὁ μόνος Χριστός. {ΝΕΣΤ.} Λέγεις οτι επαθεν ὁ Υἱός; Επαθεν ουν καὶ ὁ Πατήρ· εἰ δὲ λέγεις οτι ὁ Πατὴρ οὐκ επαθεν, ἑτεροούσιον αὐτοῦ πεποίηκας τὸν Υἱόν. {ΚΥΡ.} Ουτε τὸν Πατέρα λέγω παθητὸν, ουτε τὸν Υἱὸν ἀπαθῆ· ἀλλ' ἀπαθὲς μὲν τὸ Θεῖον, οτι καὶ ἀσώματον· παθητὸς δὲ ὁ Κύριος διὰ τὴν σάρκα. {ΝΕΣΤ.} ̓Εγὼ οὐ λέγω τὸν Λόγον σάρκα γενόμενον, οὐδὲ παθόντα· ἀπαθὲς γὰρ τὸ Θεῖον, καὶ παθῶν ἀνώτερος ὁ ἀπαθής· παθητὴ δὲ σὰρξ καὶ θνητὴ ἀνθρωπίνη φύσις. {ΚΥΡ.} ̔Ομολογοῦμεν καὶ ἡμεῖς ἀπαθὲς τὸ Θεῖον, διὰ δὲ τῆς σαρκὸς κατεδέξατο πάθος· οθεν, Χριστοῦ παθόντος σαρκὶ ὑπὲρ ἡμῶν· τὸ δὲ, Χριστὸς οὐκ ἀλλότριον Θεοῦ ονομα· ὁ γὰρ ἀπόστολος Παῦλός φησιν· ̓Εξ ων ὁ Χριστὸς, ὁ ων ἐπὶ πάντων Θεὸς εὐλογητὸς εἰς τοὺς αἰῶνας. ̓Αμήν.
English
But the Son by grace is ignorant, but not the Son by nature; by grace we are ignorant of everything, knowing nothing about the ends of the age. {Nestorius.} By nature we hunger and thirst and sleep, not suffering this by choice, but subject to the necessity of nature. What then? Will God be found to follow compulsory laws? Far from it. {Cyril.} We indeed hunger and thirst and sleep by nature, not by choice, but enslaved to the necessity of nature; but He does so not by necessity, but by choice; for from five loaves he fed five thousand, and from seven again four thousand; He Himself said: "No one takes my soul from me, but when I wish, I take it; and no man can do this, except Christ alone." {Nestorius.} Do you say that the Son suffered? Then the Father also suffered; but if you say that the Father did not suffer, you have made the Son of a different substance from Him. {Cyril.} I neither call the Father passible, nor the Son impassible; but the Divine is impassible, because it is also incorporeal; but the Lord is passible on account of the flesh. {Nestorius.} I do not say that the Word became flesh, nor that He suffered; for the Divine is impassible, and the impassible is above sufferings; but the flesh is passible and mortal, a human nature. {Cyril.} We also confess that the Divine is impassible, but through the flesh He underwent suffering; whence, "Christ suffered in the flesh for us"; and "Christ" is not a name alien to God; for the apostle Paul says: "From whom Christ is, who is God over all, blessed unto the ages. Amen.
Citation. Tergwame, “Dialogus cum Nestorio”, khazarzar-cyril-of-alexandria-dialogus-cum-nestorio:1, machine-draft, 2026. https://naxiai.com/christian/works/khazarzar-cyril-of-alexandria-dialogus-cum-nestorio#s1
Colophon. Source: khazarzar · licence: Migne PG text (public domain); khazarzar host and the digitising project state no licence for this layer · model: deepseek/deepseek-v4-flash:floor · provider: Relace · cost: $0.0029 · generated 2026-11-15.